13132531 has 4 divisors (see below), whose sum is σ = 13140864. Its totient is φ = 13124200.

The previous prime is 13132519. The next prime is 13132547. The reversal of 13132531 is 13523131.

13132531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 13523131 = 983 ⋅13757.

It is a cyclic number.

It is not a de Polignac number, because 13132531 - 2⁷ = 13132403 is a prime.

It is a super-2 number, since 2×13132531² = 344926740931922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13132499 and 13132508.

It is not an unprimeable number, because it can be changed into a prime (13132831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1000 + ... + 5221.

It is an arithmetic number, because the mean of its divisors is an integer number (3285216).

Almost surely, 2^13132531 is an apocalyptic number.

13132531 is a deficient number, since it is larger than the sum of its proper divisors (8333).

13132531 is an equidigital number, since it uses as much as digits as its factorization.

13132531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8332.

The product of its digits is 270, while the sum is 19.

The square root of 13132531 is about 3623.8834142395. The cubic root of 13132531 is about 235.9298065208.

Adding to 13132531 its reverse (13523131), we get a palindrome (26655662).

It can be divided in two parts, 1313 and 2531, that added together give a square (3844 = 62²).

The spelling of 13132531 in words is "thirteen million, one hundred thirty-two thousand, five hundred thirty-one".